Микроразметка Schema.org для InstantCms

<div typeof="v:Review-aggregate" xmlns:v="http://rdf.data-vocabulary.org/#">
<span property="v:average">средний рейтинг страницы  {$sredniy_rating|truncate:6}</span> | <span property="v:votes"> всего голосов {$sum_votes}</span > |  <span >сумма рейтинга {$sum_rating}</span>
</div>	 

 
foreach($items as $key=>$item) {
   $sum_rating = $sum_rating + $item['rating'];
   $sum_votes = $sum_votes + $item['rating_votes'];
        }
 $sredniy_rating= $sum_rating/count($items);
...
...
$smarty->assign('sredniy_rating', $sredniy_rating);
$smarty->assign('sum_votes', $sum_votes);
$smarty->assign('sum_rating', $sum_rating);